Question: Which chemical tanker has the largest payload mass?
Paraphrase: Which chemical tanker has the greatest weight of payload?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q15254 . ?ent wdt:P4519 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Blue Jade, Green Sky, Torm Thor, STI Poplar, Atlantic Jupiter